Boat builder&#39;s clamp



March 15, 1949. M. HELLINGS BOAT BUILDERS CLAMP 2 Sheets-Sheet 1 FiledJune 12, 1947 I INVENTOR. IV/CHQEL Hay/Yea A'ITD RN EYS March 15, 1949.

Filed June 12, 1947 M. HELLINGS BOAT BUILDER'S CLAMP 2 Shets-Sheet 2INVENTOR.

M/CHAIEL HELL/N66 ATTU R N EYS Patented Mar. 15, 1949 UNITED STATESPATENT OFFICE My present invention relates to the general class ofpushing and pulling implements of the jack type employing a single throwpivoted, lever and clamp or base plate therefore, and more specificallyto an improved boat builders clamp which, while adapted for variousother purposes is especially designed to press against and hold down theside boards against the ribs or frame structure, as well as for use inclamping down planking on the deck, of a small boat, in the process ofboat building.

The primary object of the invention is the provision of a lever operatedmechanism for this purpose that is composed of a minimum number of partsthat may with facility be manufactured at low cost of production, andassembled with convenience, to insure a manually operated implement thatmay be easily handled for clamping or pressing the successive boardstemporarily into place in order that the boards may be fastened to theribs or frame of the boat in usual manner.

The invention consists in certain novel features of construction andcombinations and arrangements of parts involving a detachable clampforming the fulcrum support for a single throw lever, together with anadjustable presser on the lever for the application of power, and inother combinations as will be hereinafter described. In the accompanyingdrawings I have illustrated a complete example of a physical embodimentof my invention wherein the parts are combined and arranged in accordwith one mode I have devised for the practical application of theprinciples of the invention. It will however be understood that changesand alterations are contemplated and may be made in these exemplifyingdrawings and mechanical structures, within the scope of my appendedclaims, without departing from the principles of the invention.

Figure 1 is a vertical sectional view through a fragment of a boat hull,showing an implement embodying my invention and in position for use.

Figure 2 is an enlarged side view of the implement, part of the handlever being broken away for convenience of illustration.

Figure 3 is an enlarged detail transverse sectional view through theclamp device, as at line 3--3 of Fig. 2.

Figure 4 is a sectional detail view as at line 44 of Fig. 2.

Figure 5 is an enlarged detail sectional view at line 5-5 of Fi 2.

Figure 6 is a fragmentary perspective view enlarged showing the use of aretainin pin for a portion of a cross section of a boat including one ofthe frame ribs R and some of the longitudinally extending boards Bsecured to the rib,

and the purpose of the implement is to tem porarily clamp successiveboards into close con- '1 tact with each other and with the 'rib so thatthe board and rib may be properly'fastened together in suitable or usualmanner.

In mountingthe manually operated implement it is rigidly clamped uponone of the ribs R, by means of an upright base plate I that is equippedwith a pair of integral vertically spaced projections or lugs 2 and 3for frictional engagement with the outer face of the rib R, and forco-action with these clamping lugs the plate is provided with a clampbolt 4 threaded in a bracket 5 of the base plate and provided with ahead 6 for impingement against the inner side or face of the rib R.

The clamp, when in place forms a fulcrum base or pivotal support for asingle throw lever I that is pivotally mounted on the base plate bymeans of a fulcrum bolt 8 which passes through holes in a U-shapedreinforcing yoke 9, through the lever, and also through a spacing washerl0; and the bolt is secured by a usual lock nut l l For guiding themovement of the lever, and for use in retaining it in locked position aslightly ofi'set strap I2 is welded or otherwise secured at its ends tothe base plate, and the strap is drilled with multiple holes orapertures l3 for selective use in receiving a retaining or locking pinl4 that is adapted to frictionally engage the upper edge of the lever,after the board is pressed into place and while the board is beingfastened to the rib.

For application of the power transmitted by a down stroke of the leverto the board B, the lever is equipped with a slidable and adjustablepresser chuck or tubular block l5 that surrounds the lever and isadapted to be slid into engagement with the upper edge of the board Band contact its outer face for pressing the board into place.

For this purpose the chuck is fashioned with 55 an integral angularbracket having presser faces I6 and I! for contact with the board inpressing it downwardly and inwardly, and then in co-action with theretaining pin M the board is temporarily held in place by the implement.

The adjustable presser chuck, or dog for the application of power fromthe lever is slidably adjustable for initial engagement with the board,and after adjustment against the board the presser is locked,automatically, in place by means of a key-wedge l8 that is inserted inthe bore of the chuck, between the chuck and the lever, and the chuck isheld in place by means of a spring 19, mounted in the presser chuck,which forces the wedge l8 against the bore.

For releasing the lever, the resiliently retained chuck i8 may be pushedinto the bore of the chuck against the spring I9, the locking pin [4 maybe removed; and then the clamp bolt may be turned backward to disengagethe base plate from the rib; whereupon the implement may be removed, andsuccessively used in the manner described.

Having, thus fully described my invention, what I claim as new anddesire to secure by Letters Patent is: V

1. In a boat builders implement, the combination with a clamp deviceforming a fulcrum base, and a single throw lever, pivotally mounted onthebase, of a slidably adjustable presser element mounted on the leverand resilient means for retaining said element .in operative position,and co-acting means on the base and lever for re.- taining the lever inposition for application of its power. I

2. In a boat builders implement, the combination with a clamp deviceforming a fulcrum base, a single throw lever pivotally mountedon thebase, an apertured strap mounted on the base for guiding the lever, anda locking pin mounted in the strap for engagement with the lever, of a 4slidably adjustable presser element mounted on the lever, and resilientmeans co-acting with the element and the lever for retaining the elementin position on said lever for application of its power.

3. In a boat builders implement the combination with a clamp deviceforming a fulcrum base, a lever pivotally mounted on the base, aslidably adjustable presser chucl; mounted on the lever, and a Springpressed key-wedge co-acting with the chuck and lever, of an apertureclstrap mounted on the base for guiding the lever, and a locking pinmounted in the strap for frictional engagement with the lever.

4. In a boat builders clamp, the combination with a clamp deviceincluding a base plate having spaced clamp lugs, and a clamp boltoperatively mounted on the base plate, of a lever pivotally mounted onthe base plate, an apertured guide strap rigid with the base plate, alocking pin mounted in the strap for frictional engagement with thelever, an adjustable presser chuck mounted on the lever, and means forretaining the chuck in adjusted position on the lever.

5. In a boat builders clamp, the combination with a base plate having apair of spaced clamp lugs, a. clamp bolt operatively mounted on theplate for co-action. with the lugs, and a lever pitotally mounted on thebase plate, of an apertm'ed strap mounted on thebase plate for guidingthe lever, a locking pin mounted in the strap for irictionally engagingthe lever, a slidably adjustable presser chuck mounted on the lever, anda. spring-pressed key-wedge co-acting with the lever and chuck forlocking the latterxin operative position. 1

MICHAEL HELLINGS.

No references cited.

